Ventilation grids



FIG. 1 is a perspective view of a first embodiment of a ventilation grid in accordance with the present invention;

FIG. 2 is a bottom view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is a perspective view of a second embodiment of a ventilation grid in accordance with the present invention;

FIG. 6 is a bottom view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a side view thereof;

FIG. 9 is a perspective view of a third embodiment of a ventilation grid in accordance with the present invention;

FIG. 10 is a top view thereof;

FIG. 11 is a bottom view thereof; and,

FIG. 12 is a side view thereof. 

The ornamental design for ventilation grids, as shown. 